exercise training in patients with peripheral vascular disease

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Univers

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The copyright of this thesis vests in the author. No quotation from it or information derived from it is to be published without full acknowledgement of the source. The thesis is to be used for private study or non-commercial research purposes only.

Published by the University of Cape Town (UCT) in terms of the non-exclusive license granted to UCT by the author.

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Table1.1 Review of the randomised controlled trials in exercise and n:::>ltu"n1'''' with vascular disease

[late

9 Jnln

DVfln111!C ~3PVD nun

PT~\

DynCll11ic 16

1 hOUI2X

Abbreviations: k~

SPVD"'supervlsed, PTA'"

n"numbel subjecls, Ovnamic=dvnarnic home"a!

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34

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3: IN

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ity of

Cap

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Univers

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Cap

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n

tests were converted to a single variable for each patient by plotting an area

under the curve for each patient. The data was normalized by expressing the

pain measure (Y axis) relative to 100% of elapsed time (the X-axis).

Results

Patient characteristics on entry to the study

Location of PVD

The location of peripheral vascular disease is shown in Figure 3.1

21%

15%

Figure 3.1 Location of disease in patients with PVD

• Fem-pop

o Iliac

• Below knee

o lIiac/fem-pop

Abbreviations: iliac=iliac arteries, fem-pop=femoral-popliteal arteries, below knee=peroneal, anterior tibial artery or posterior tibial artery, lliaclfem-pop=femoral popliteal and iliac arteries

Thirty one patients with peripheral vascular disease were recruited for the study.

Twenty two patients had bilateral disease and nine patients had unilateral

disease. "Femoral-popliteal disease" in Fig 3.1 refers to disease of the femoral

and popliteal arteries. "Iliac" refers to either or both the internal and external iliac

arteries, and "below knee disease" constitutes disease of one or all of the

peroneal artery, anterior tibial artery and the posterior tibial artery. "lIiadfem-pop"

refers to disease of both the iliac and femoral-popliteal arteries.

- 38-

Univers

ity of

Cap

e Tow

n

N were

are in 3.1

Table 3.1 Patient characteristics on to the

Mean ±SD 63±13 27±5.0

range

Table 3.2 Distribution of of age and 8MI

mass index, %=percentage

N

as by was

over

39

Univers

ity of

Cap

e Tow

n

one

2

in is in

Table 3.3 Medical and risk factor of ",::>t,,,,n1tc:: with PVD on to the trial

40

Univers

ity of

Cap

e Tow

n

vascu

none

a

\IV ..... " ..... , none

l,o,rIT'l/'''o no the were in or

A

never were on

nu

vascu

A

in

41

Univers

ity of

Cap

e Tow

n

in

Table 3.4 Number of medication

with PVD cardiovascular and

Number of n!1llflAlnrc:

15 25

f--c-c.,,--..,,-<C.L---------------/-----------

48 81 16

A

1

serum

were

5 26 14

84 45

are

d are

were on

in

Table 3.5 Pain free distance and maximal distance of n!1lirit>lntc: with PVD on to the the treadmill exercise test walk test

Values are expressed as means ± SO and range

on

was more

42

Univers

ity of

Cap

e Tow

n

d

more

are

Table 3.6 Peak oxygen in with PVD on the

re

ventilation and treadmill exercise test

43.0 ±14.0 r=--~~~--~:~--------------+--

0.97 ±0.13 114 ±22

r-~'--~--~~+-~~~--~~~ ~~-------2.1 ±1.6 3.28 ±1.39 0.59 ±0.41

was

±110

ratio

I--c=~------~--~--~~~------+--- .~------------~----~------------- ------~

~-~~-------__ ~~~~~----~O.43±0.3~9------------~~~~~----------.----~ 31 ±46

VE=minute ventilation, pressure index. Values are <ovn,,,,,,,,,,ri

was

was a

1 vs

u vs

43

Univers

ity of

Cap

e Tow

n

in

in

Table 3.7 Peak oxygen venous lactate concentration in

exercise test

B6 ±5 1.12 ±O.O3 34.3 ±3.5

7B.7 ±5 7.3 ±O.3

in

in are

ratio and

--_ .. -

1.4 ±O.2 17 ±5 26 ±6 17 ±4.2

41.3±13.5 87.5 ±22.1 43 ±14.2 ------_ .. ----5.1 ±2.7 9.7 ±2.7 3.3±1.4

exchange ratio, consumption, VE=minute ventilation, hearl controls, obstructive disease, COPD-CONT=chronic obstructive pulmonary disease controls, PVD=peripheraJ vascular disease. are expressed as means ±SD

in

F

on

a was are

44

Univers

ity of

Cap

e Tow

n

Table 3.8 Results of a correlation treadmill exercise test and

with PVD.

1--=-:-::~~-'---------1 NS I\JS

tolerance on the variables of

I--:---:::-:=--;------::---;-----------t------.--.---------t-c~-------------

NS NS

on

is

venous

NS NS

n=31 P=O.005

NS

NS NS NS NS NS :-::-------------1

NS mass

""n,,,,,,,,,f\n V02=oxygen consumption, RER=respiratory exchange exercise ankle brachial index, Pr=pressure, MWD=maxilllunl walking distance,

m=meters, GTET=graded treadmill exercise test, r Value=correlation coefficient,

I,

mass on

was no

or

re

45

II

Univers

ity of

Cap

e Tow

n

In

on

30

25

20

15

10

5

o o

or

nor was

ora

was

• .-- - -•

200 400 600 800

Maximum distance

between maximum distance and oxygen treadmill exercise test ).

46

Univers

ity of

Cap

e Tow

n

90 c:

80 0 ;l

70 III ;l 60 c: (I.)

50 > (I.) 40 ..... ::s c: 30 E

.lII: 20

III 10 (I.)

0.. 0 0

3.3 ", .. I",t." •• ",

8

7

6

5 4

3

2 .. .lII: 1 III (I.) 0 a..

0

3.4

..

200 400 600

Maximum distance

between maximum treadmill exercise test

..

.. • ..

--- --1

50

Pain free

800

venous lactate distance on the treadmill

47

Univers

ity of

Cap

e Tow

n

1.B • 1.6 1.4 •

iii 1.2 « • • O.B - . * • 0.6 • •

• • • - . • 0.4 •• 0.2 .- --------------

0 -+- • • • -,. 0 200 400 600 BOO

Maximum distance

between distance

1.8 • 1.6 1.4 •

iii 1.2 <C • • 1

0.8 • • • 0.6 • • -. .-- - - --- -----

0.4 • 0.2 •

0 • • , .. • .. 0 100 200 300

Pain free

free distance

48

Univers

ity of

Cap

e Town

if

a was are

between measures of tolerance on the six minute walk test and

with PVD

NS

variables of one

r=O.51 n=31 P=O.003

NS NS NS NS

InnM~T~~==;~~:~----- ----........................... I=r==ro\.~3~'6;--------· ............. - ............ --........................... -,

n=31 P=O.049 1:·--;:-;:--:--:-----::------+--·---··------------------+-:-=-----------------NS NS

I---:::-----:-'::-------:-----:---:-:--::---'--____ =-+-N_S ___________ ---t-:N..:..S:---_____ _ NS NS r=O.52 N=31 P=O.003

r=-~7~~C-~-~·--------------------r~-----------

--+-----------------

NS -.-------------.-------f

NS NS NS NS ----;;----:--::::-:-c---------+.:...:..::'-:--c:::---------------,I---:--'--:=-.-------r=-O.53 NS n=26

!-_-,_-----:cc _____ .. _--;:---_____ t--=--P_=c._O,.006 NS NS

~-..::--:-:-:=--=':_'_____:'----- ----+------------.. -.--1----,-------------r=-O.33 NS n=31 P=O.073

[-iljUi.ir'I.;:;~Ti::T\--------t:::r==rO,=,. 5~4o'-"-----------------·-+r=·····O·······.··5····-c8-.. -------------------]

n=31 n=31 P=O.002 P=O.001

Ir:>iMun·'-,;;-Tr::;::;:------.. ·--------i NS r=O. 39

n=31 P::::O.033

mass DOD=duralion of disease, Pk V02'=oxygen consumption, RER=respiratory exchange ratio,

exercise ankle brachial index, Pr=pressure, HR=lleart rate, bpm=beats PFWD=pain free walking distance, m=melers, GTET=graded

coefficient, NS=non significant

49

Univers

ity of

Cap

e Tow

nd

I,

50

a

ure

were

on

Univers

ity of

Cap

e Tow

n

~ 700 ~

600 • en --------------- -

CIJ • • u 500 I:: III .... 400 fII

"C 300

200 • 100

E :::I 0 E

0 200 400 600 800 'j( III ~ Maximum distance GTET

3.7 distance on the distance on the six

~ 300 ~ • en 250 CIJ u c:: 200 ---- ------- - • .!!I

.!!! 150 "C • 100 ...

• • 50 .- • o·

o 200 400 600 800

Maximum wa distance GTET

distance on the distance on the six minute

51

Univers

ity of

Cap

e Tow

n

~ 300 ::E en 250 IV

g 200 .m .!!! 'C 150

I!! :::I en

120

100

80 60

40

20 en 0 I!! c. -20 CII 32 -40 s:: 4: -60

• •

o 100

Pain free wa

Maximum

200

distance GTET

300

distance on the distance on the six minute

distance SMWT

between ankle pressure distance on the six minute walk test

52

Univers

ity of

Cap

e Tow

n

a

n

In

was

53

vascLi

with

occurrence

as

as

women

a

in

Univers

ity of

Cap

e Tow

n

cause

1 a on

aL 1 1 ).

as a in al.

(1 in

is

is was

are

d it seem

54

Univers

ity of

Cap

e Tow

n

in

orc,'tnr'o in

In

in

in

it is common

al. (2000)

causes an

as a

55

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ity of

Cap

e Tow

nal. (1

su

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al. 1

1

never

venous

on

1

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to

venous

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a

never

al.

Univers

ity of

Cap

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or training in

1

was

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(1

in healthy

it wou Id seem it was more

1

57

cause

venous

al.

in

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in

ure

an

aL

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Cap

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Univers

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59

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even

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ity of

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so an measure

vs

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60

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a

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17

k

12

highest venous

or

Univers

ity of

Cap

e Tow

n

not m or

a

in

is

or in

in

61

Univers

ity of

Cap

e Tow

n

in 1,

al. 1

a

were

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with

, 1

al. 1

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walk near

ill

a

in

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ity of

Cap

e Tow

n

in it was

was an

arm cran

one

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al.

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occur

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with

is su

63

Univers

ity of

Cap

e Tow

n

as as at in

on

were

in in

one a one

wasd cancer.

All All were

64

Univers

ity of

Cap

e Tow

n

were mill

a

an

was measu

were

was

in

a

in 2 in

were as

65

Univers

ity of

Cap

e Tow

n

area

A

A

u

were

measure (Y

in

su

are

anova was

d

in 1.

a an

measures was

in l1

in

in

assess

was assess in

on

66

Univers

ity of

Cap

e Tow

n

Table 4.1 General characteristics of with PVD in the treatment groups and the control group on to the

77 ±14 ----------+-:,-----:-----------4

27±6 30±3 24 ±30 29 ±30

1-:::---.-'--;--.-;:'------:-'--+-:-~=-::--::-------+-=-:15 ±32 16 ±21 I-:=,:~~=-'-':-=-ll:.:-_=_:"-C-'-+_=----'-'==-----·---_l--------------------t------------------------------------ -------i

5 5 4 3

7 Abbreviations: YFyear, squared, nr=number of patients in "I.=npyrpr,I,,,,A of patients in each group, mixed=mixed ancestral origin. SD=standard deviation, training group, CER=conventional exercise rehabilitation group, CONT=control group. Values are ovnH,ccori as means ±SD

were

in group,

of are in

67

Univers

ity of

Cap

e Tow

n

Table 4.2 Medical control group on

The

with PVD in the two treatment groups and the

7

2 2

patients in each group and the percentage of patients in each group

in

in

were

in and

are in

68

Univers

ity of

Cap

e Tow

n

Table 4.3 Patients nnc .. ;::' .. nn medication in the two treatment groups and the control group

CONT=controi group. Values are expressed as number group ingesting the medication

was no

Table 4.4 treatment groups

means ±SD

to exercise

group, CER=conventional patients in each group and the percentage of patients in

in

two

sessions intervention in the two

69

Univers

ity of

Cap

e Tow

n

u

in are

Table 4.5 in from to exit of the programme in the USST group

ue

56 P=O.OO2* 49 ±3 66 ±9 35 P::::0.OO03* -----. 22 ±7 43 ±13 49 P=0.OO03*

-.-----"-.-.-~- -~.--------.

14 ±2 29 ±16 107 I P=0.02* i I ------

41 ±6 58 ±i5 41 P=O.009* 12 ±3 16 ±5 33 P=O.08 31 ±7 41 ±11 32 P=O.OO1* --------22 ±7 34 ±12 55 P=O.OO2* 17 ±9 32 ±i7 88 P=O.02*

-----_.

42 ±7 60 ±10 43 P=O.OO1* ... nnmv,;o'flon,,,· Ib=pounds .• =p<O.05 strength entry vs strength exit. Values expressed as mean ±SD

'r.nnr..-.T in in

in

70

Univers

ity of

Cap

e Tow

n

Table 4.6 Peak VOz• peak VE, peak RER and peak HR during the graded treadmill exercise test on entry to the study and after the six week intervention period

UBST (n=9) CER (n=9) CONT (n=8) Owks 6 wks Owks 6 wks Owks 6 wks

PkV02 19.7 ±4.6 18.7 ±6.1 14.8 ±3.4 19.4±4.6* 18.2±3.9 17.6 ±3.4 mI02'kg-1'min-1 PkVE 47.6 ±20 47.0 ±19 37.9 ±10 45.0 ±12 48.0 ±14 51.0 ±15 l.min-1 Pk RER (units) 0.93 ±0.1 0.95 ±0.7 0.94 ±0.1 0.99 ±0.1 1.02 ±0.2 1.0 ±0.2 Pk HR 107 ±25 110 ±26 118 ±17 122 ±19 122 ±15 128 ±10 bpm Abbreviations: Pk=peak, VOroxygen consumption, VE=ventrlatlon, RER=resplratory exchange rallo, HR=heart rate, wks=weeks, bpm=beats per minute, UBST=upper body strength training, CER=conventional exercise rehabilitation group, CONT=control group. *=p<O.05 CER vs CONT and CER vs UBST. All values expressed as mean ± SO.

There was no significant difference between the groups with respect to peak

V02 , peak VE, peak RER, and peak HR on entry to the study

Peak V02 in the CER group increased significantly more after training than the

control group (29% vs -1 %, CER vs control, p=O.008) (Fig 4.1) and the UBST

group (29% vs -6%, CER vs UBST, p=O.002) (Fig 4.1), indicating a training

response in the CER group.

60

'E 50

~ 40 -"S - 30 "CI'ti f! .! 20 ClQ)

;;.!!! 10 o U > ~ .: ~ 0

~ ·10 I::

~ -20 U

::.E! o -30

-40

-,---

I 'I

-,--

-'--

c::::J UBST

~I CER

ii!iIIIIIIIICONT

Figure 4.1 Percentage change in maximum oxygen consumption after six weeks of intervention ... =p<O.05 CER vs UBST * =p<O.05 CER vs CONT. All values expressed as mean ±SD

- 71 -

Univers

ity of

Cap

e Tow

n

was no

group

in

Table 4.7 Submaximal RER and heart rate measurements treadmill exercise test in the treatment groups and the control group on and after the six week intervention

6wks 13.1±3

--_ .. ------ -----. 14.0±5 13±3.2 14.3±3 14.5±3

32±13 25.3±7 25.6±5 24.9±3

o

---35.1±18 33.2±12 33±6 31.9±6 34±9

O.77±O.O7 O.79±O.O8 O.79±O.13 O.75±O.O9 O.85±O.O9 O.84±O.O9 O.8B±O.07 O.9±O.15 O.86±O.14 O.B9±O.11 92±20 94±21 102±21 92±1 94±15

96±23 111±20 104±14 "+ 103±14

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31.5±10

-----35.6±14

O.B2±O.OB O.89±O.10 109±11

115±10

ventilation, exchange ratio, HR=heart rate %==percentage, per minute, min=minute, wks=weeks, UBST=upper strength training group, CER=conventional exercise rehabilitation group, CONT=control group, All values expressed as mean ± SD * =1"'<0.05 CER vs CONT. 1= p<0.05 CER vs CONT and CER vs UBST.

was

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group compared to the UBST group (-6% vs 6%, CER vs UBST, p=O.004)

indicating a training response in the CER group.

c::::J UBST E~lCER

_CaNT

Figure 4.2 Percentage change in submaximal heart rate at minute two after six weeks of intervention. • =p<O.05 CER vs CONT. All values expressed as mean ± SD

c=JUBST

CER

IIIII!IIIII!IIICONT

Figure 4.3 Percentage change in submaximal heart rate at minute four after six weeks of intervention. • =p<O.05 CER vs CONT and **=P<O.05 CER vs UBST. All values expressed as mean ± SD

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Table 4.8 Maximum heart rate and recovery heart rate in the six minute walk test in the treatment groups and the control group on to the and after six weeks of intervention

in

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wks=weeks, UBST=upper body group. All values expressed as mean ±

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Table 4.9 mass, 8MI and fat of treatment groups and the control group on and after six weeks of intervention

CONT 6wks 6wks Owks 78.5 76.7 84

±19 ±14 ±13 ±14 26.9 26.7 26.6 29.8 ±5.3 ±5.6 ±5.0 ±3.2

Fat 29.7 30.6 30.06 33.6 ±5.1 ±5.18 ±7.3

Abbreviations: BMI=body mass squared, body strength training group, CER=conventional exercise rehabilitation group, CONT=control group" =p<O.05 UBST vs CONT. All values expressed as mean ± SD

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Table 4.10 Maximum free distance and total the nr~lrI"'rl treadmill exercise test and the six minute walk test in the treatment groups and the control group on to the and after six weeks of intervention

UBST Owks 6wks --390±211 399±186

~-------.. ~.-----.---.,-----.-

128±121 202±175 126±157 256±187 175±123 175±136 ~--------------

441±128 484±122 373±116 425±117 415±144 408±125 ----~----------------.- ---------- .-.. --.. -._---------- .. _-170±165 169±99 119±101 157±1 192±147 11

302±12 271±56 284± 117 251±162 257± 153 251± 1

327±42 391±134 359 ±126 292± 1 359± 108

m=meiers, exercise test, SMWT=six minute walk UBST=upper body training group, rehabilitation group, CONT=control group, wks=weeks * :: p<O.05 CEH vs UBST; t = P<O.05 CEH vs CONT. CER vs CO NT. Values are expressed as means ±SD

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Figure 4.4

Figure 4.6

Figure 4.8

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Figure 4.7

Figure 4.9

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Table 4.11 and venous lactate concentrations in the treatment groups and the control group on to the and after six weeks of intervention

3.0 ±1.2

CER=conventional exercise rehabilitation, CONT=control group,. All values expressed as mean ±

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Table 4.12 blood pressure, exercise ABI and ankle pressure in the treatment groups and the control group on to the and after six

weeks of intervention

pressure

O.6±O.3 OA±OA

32.2±48

CER=conventional exercise rehabilitation group, CONT=controJ group.

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6wks Owks 134±22 161±25

O.l±O.5 O.9±D.2 -------~~------~-------OA±DA O.6±OA

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Table 6.1 Graded treadmill exercise test nrt'1ifnr"n ot al.

STAGE: SPEED GRAm: MINUTES I 3.2km/h 2% 1

2 II 3.2km/h 4% 1

2 III 3.2km/h 6% 1

2 IV 3.2km/h 8°/" 1

2 V 3.2km/h 10% 1

2 ._-_ .. _--VI 3.2km/h 12% 1

2 _ .... ---

VII 3.2km/h 14% 1 2

-_P--.. -···- ---.. -.

Table 6.2 Modified Bruce treadmill exercise test

STAGE

2 3

II 1.7km/h 5% 1 2 3

1 2 3 1 2 3

14% 2 3 1 2 3

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Table 6.4 Content of the exercise group

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Table 6.5 An of the UBST programme for one of the members of the UBST group

50 c-:-:--:----;:---;-----j------.-

50 25

I--=-----"------j 15

35 30 30

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